Thermostat: Service and Repair

Thermostat













Removal and Installation

1. Drain the cooling system. For additional information, refer to Cooling System Draining, Filling and Bleeding Cooling System Draining, Filling and Bleeding.

2. Remove the Air Cleaner (ACL) assembly and outlet pipe. For additional information, refer to Fuel Delivery and Air Induction.

3. Remove the 2 bolts and position aside the thermostat housing cover.
- To install, tighten to 10 Nm (89 lb-in).

4. Remove the O-ring seal and thermostat.
- Clean and inspect the O-ring seal. Install a new seal if necessary.

5. NOTICE: The engine cooling system is filled with Motorcraft(R) Specialty Green Engine Coolant. Mixing coolant types degrades the corrosion protection of the coolant. Do not mix coolant types. Failure to follow these instructions may result in engine or cooling system damage.

NOTICE: Genuine Mazda(R) Extended Life Coolant and Motorcraft(R) Specialty Green Engine Coolant are very sensitive to light. Do NOT allow these products to be exposed to ANY LIGHT for more than a day or two. Extended light exposure causes these products to degrade.

NOTE: Lubricate the thermostat O-ring seal with clean engine coolant.

To install, reverse the removal procedure.

6. Fill and bleed the cooling system. For additional information, refer to Cooling System Draining, Filling and Bleeding Cooling System Draining, Filling and Bleeding.